Why it works: Beef and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,092 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Hare Soup
Ingredients
Directions
Prepare
Clean and cut the hare into pieces.
Place the hare at the bottom of a pan.
Add the beef, ham or bacon, onions, and sweet herbs.
Stew and strain
Pour in the boiling water and let it stew until the meat is tender.
Strain the soup and remove the fat.
Finish and serve
Reboil the soup and add the soy sauce.
Serve with force-meat balls if desired.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Photo for illustrative purposes only · Contact us to use it
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
-
Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beef + hamtop 15% of all pairsSmell alikemoderateCooked together1,729 recipes
Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
-
Ham + oniontop 18% of all pairsSmell alikelowCooked together4,159 recipes
Shared aroma: gamma-nonanolactone (coconut, sweet).
-
Onion + saucetop 19% of all pairsSmell alikelowCooked together10,474 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Ham + saucetop 22% of all pairsSmell alikelowCooked together1,314 recipes
Shared aroma: ethanol (alcoholic, ethereal).
Onion and sauce barely smell alike, yet cooks put them together in 10,474 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Hare (in the method)
- Provides the main meat flavour and body of the soup.
- Lean beef
- Adds further meat flavour and gelatin-rich body as it simmers.
- Ham or bacon
- Adds salty, smoky richness to the broth.
- Onions
- Contribute sweetness and aromatic depth to the stock.
- Soy sauce or harvey's sauce
- Adds savoury, umami depth and dark colour to the finished soup.
The step that matters
Remove the fat after straining. Fat rises and collects on the surface of a stewed broth, and leaving it in makes the soup greasy and heavy on the palate. Skimming after straining, while the liquid is hot, removes most of it cleanly.
Swap the onion
How well each one fits the dish's main ingredients (beef, ham, sauce):
- Tomatofits about as well
- Onionthe original
- Mustardfits about as well
- Shallotfits less well
Fit is the average pairing score against beef, ham, sauce. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
More hare soup recipes
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Roast Beef211 recipes
Beef Loaf175 recipes
Corned Beef87 recipes
Beef Broth67 recipes